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11.04.2020 •
Mathematics
If $48,000 is invested in an account earning 3.1% interest compounded continuously, determine how long it will
take the money to triple. Round to the nearest year. Use the model A = Pert where A represents the future value
of P dollars invested at an interest rate r compounded continuously for t years.
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Ответ:
It will take about 35.439 years to triple.
Step-by-step explanation:
Recall the formula for continuously compounded interest:
where "A" is the total (accrued or future) accumulated value, "r" is the rate (in our case 0.031 which is the decimal form of 3.1%), "P" is the principal, and "t" is the time in years (our unknown).
Notice also that even that the final amount we want to get is three times $48,000. So our formula becomes:
Now,in order to solve for "t" (which is in the exponent, we use logarithms:
Ответ:
I honestly don't know.